View clinical trials related to Influenza, Human.
Filter by:The purpose of this phase I/II trial is to evaluate safety and tolerability of a single dose of GHB16L2 administered by liquid nasal spray for vaccination against seasonal influenza virus infection. It is also performed to assess immunogenicity and pharmacokinetics (shedding).
Based on information from several years of looking at Influenza vaccination doctors know that: - Older adults suffer the worst illness and most deaths caused by Influenza illness of all age groups. - Older adults do not seem to get as good a level of protection as younger adults after getting the usual seasonal Influenza vaccine. Because of this information doctors wonder if one of the new seasonal Influenza vaccines is more effective or more acceptable. This study has been designed to answer some of these questions. On this study doctors will compare 2 new vaccines against the usual seasonal influenza vaccine for protectiveness using several different testing methods (including the usual tests) and for acceptability.
This is a phase I, randomized controlled trial to evaluate the safety of Lactobacillus rhamnosus GG (LGG) versus placebo in elderly subjects receiving the trivalent inactivated influenza vaccine. Lactobacilli are part of the normal flora of the intestine. LGG is one of several strains of Lactobacilli that is used as a probiotic or microorganism administered to confer "health benefits". Our research is focused on studying the possible therapeutic effects of LGG. The study hypotheses are: 1. LGG or placebo administered twice daily will be safe and well tolerated in elderly subjects who have just received the trivalent inactivated influenza vaccine 2. The immune response to the influenza vaccine at day 21, 28, 56, and at the end of the influenza season will be higher in the LGG group than the placebo group 3. The occurrence rate of influenza like illness during the influenza season will be lower in the LGG group than in the placebo group 4. The diversity of the microbiota in nasopharyngeal and stool specimens at day 21, 28, 56 and at the end of the influenza season will be greater in the LGG group than the placebo group.
The aim of this study was to evaluate the immunogenicity and safety of the Quinvaxem vaccine (a liquid combination vaccine against diphtheria, tetanus, B. pertussis, hepatitis B and H. influenzae Type B). Healthy Vietnamese infants received three doses of vaccine at 2, 3 and 4 months of age according to the local Expanded Programme on Immunisation (EPI) schedule
The aim of this study is to assess antibody persistence in infants who received three doses of Infanrix hexa™ (DTPa-HBV-IPV/Hib) or Infanrix-IPV/Hib™ (DTPa-IPV/Hib) at 3, 5 and 11 months of age in study NCT00307034.
This study will evaluate safety and immunogenicity of a sub-unit Influenza vaccine when administered to adult and elderly subjects.
This is an open study of the use of AdimFlu-S (2010-2011 season) vaccine in young subjects aged between 6 months old to 18 years old. All participants will be divided into three age cohorts. First, participants aged 6 through < 36 months will receive 2 doses of 0.25 mL vaccine separated by 4 weeks. Second, participants aged 3 through < 9 years will receive 2 doses of 0.5 mL vaccine separated by 4 weeks. Third, participants aged 9 through < 18 years will receive one dose of 0.5 mL vaccine. Safety outcomes included immediate reactions at the time of vaccination, solicited local and systemic reactions within 7 days after each vaccination, unsolicited adverse events, and serious adverse events. Sera prepared from blood samples will be collected from each subject immediately prior to, and 4 weeks after each vaccination. Anti-hemaglutinin (HA) antibody titers will be determined using the WHO haemaglutination inhibition reference technique. The analysis will be observer-blinded. All participants will be followed, either by clinical visit or by telephone contact, for 6 months after the first vaccination for safety reasons.
Each potential subject will be screened before the start of the study to determine their eligibility for participation. Just prior to vaccination, a 10 mL venous blood sample will be taken from each eligible subject, for baseline titration of circulating anti-HA antibodies. Immediately thereafter, each subject received one dose of vaccine (0.5 mL) by intramuscular injection into the upper arm. Subjects will be asked to stay at the site for 30 minutes post-vaccination to observe for immediate reaction. Subjects will be monitored for adverse events during the study. At three weeks (±3 days) after the vaccination, subjects will be asked to return to the site for final collection of blood samples.
The purpose of this study is to evaluate the antibody response to each of the three influenza vaccine strains included in the seasonal flu vaccine(AdimFlu-S), as measured by hemagglutination inhibition (HAI) at 4 weeks after two doses of study vaccine, 4 weeks apart, in infants between 6 and 12 months of age.
Approximately 40 healthy subjects will be enrolled. Each subject will participate in the study for approximately 9 weeks. There will be four treatment sequences with a 5-7 day washout between treatments. Subjects will be admitted to the clinical unit on Day-1 of each dosing period and will remain in the unit until Day 2. Each subject will receive a single dose of each of the four treatments on Day 1 of each treatment period in a randomized fashion. Subjects will be discharged from the clinical research unit after the completion of all assessments on Day 2 of each period and return approximately 5-7 days later for the next dose period. Serial pharmacokinetic samples will be collected for up to 24 hours following each treatment.